That's pretty strange on two levels.
1. I can't imagine why it would act that way.
2. I can't seem to duplicate the error on my machine.
By "locked" do you mean that you can't enter back into the logic screen?
Try the newest version that I have ready, maybe that bug is gone, if not I'll look into it further.
____________________________________
Version 1.33 (10/10/01):
[*]Syntax Highlighting
[*]Allow command blocks with no commands, e.g. if (isset(12)) { }
[*]Added line number counts to the statusbar of all text editing windows
[*]More robust text editing, with gutter, margin, and more
[*]Pressing 'F1' will search a word in the Help file. The context is determined by the current position of the cursor in a text window.
[*]Improved the 'Find' text feature
[*]Added a 'Replace' text feature
[*]Added a 'Go To' text feature
[*]Added 'Bookmarks' to the text editing windows
[*]Access bookmarks through either the right click menu or using hotkeys
[*]Toggle bookmark using "CTRL+SHIFT+0". Use 0 through 9 to toggle specifics
[*]Go to bookmark using "CTRL+0". Use 0 through 9 to goto a specific one
[/list][/list]